Masahiko Ishizaki

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Publications (3)12.35 Total impact

  • Article: Very late bare metal stent thrombosis presenting with acute myocardial infarction: 14 years after coronary stenting.
    Toshiro Katayama, Fumi Yamamoto, Masahiko Ishizaki, Yoshihiro Iwasaki
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    ABSTRACT: Fourteen years previously, a 67-year-old man underwent percutaneous coronary intervention (PCI) for proximal left anterior descending artery lesion with a bare metal stent (BMS) for acute myocardial infarction (AMI) and attained an excellent result. Ticlopidine (200 mg) was administered for one month and 100 mg of aspirin was daily has been continued. One year after PCI, coronary angiography showed no restenosis. However, 14 years after PCI, he suffered from AMI due to stent thrombosis. Intracoronary aspiration thrombectomy and implantation of a drug-eluting stent were successful. This report demonstrates evidence of a very late case of stent thrombosis with the use of BMS.
    Internal Medicine 01/2010; 49(15):1549-52. · 0.94 Impact Factor
  • Article: Obstructive sleep apnoea inhibits the recovery of left ventricular function in patients with acute myocardial infarction.
    Hiroshi Nakashima, Toshiro Katayama, Chisa Takagi, Kentarou Amenomori, Masahiko Ishizaki, Yukiharu Honda, Shin Suzuki
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    ABSTRACT: It has been suggested that obstructive sleep apnoea syndrome (OSA) may be a direct cause of left ventricular (LV) systolic dysfunction. This study was designed to examine our hypothesis that OSA inhibits the recovery of LV function in patients with acute myocardial infarction (AMI). Our 86 consecutive first-AMI patients underwent primary percutaneous coronary intervention (PCI). All patients underwent polysomnography and OSA was defined as an apnoea-hypoapnoea index (AHI) > or =15 events/h, of which more than 50% were obstructive. Left ventriculograms immediately after PCI and at 21 days were used to evaluate LV ejection fraction (LVEF), LV end-diastolic volume index, and regional wall motion (RWM) within the infarct area. OSA was observed in 37 patients (43%). All three indices of LV function after primary PCI were comparable between the two groups. Increases in LVEF and RWM during admission were significantly lower in OSA patients than those without OSA (delta LVEF: -0.3+/-9.6 vs. 7.4+/-7.2%, P < 0.001; delta RWM: 0.26+/-1.04 SD/chord vs. 1.16+/-1.20 SD/chord, P = 0.002). Multiple regression analysis showed that AHI correlated negatively with delta LVEF and delta RWM. The novel finding is that OSA may inhibit the recovery of LV function in patients with AMI.
    European Heart Journal 11/2006; 27(19):2317-22. · 10.48 Impact Factor
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    Article: Thrombosed Stanford type A dissection of the aorta in an elderly patient following a fall.
    Hiroaki Kawano, Masahiko Ishizaki, Yuji Koide, Genji Toda, Katsusuke Yano
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    ABSTRACT: Physical or mental exertion is an important antecedent to dissection. A fall is one of the causes of hip fracture in the elderly population. We report the case of a 78-year-old woman who was diagnosed to have a thrombosed aortic dissection after a fall. We wish to emphasize with this case report that aortic dissection should be considered in the differential diagnosis of patients who complain of chest discomfort after a tumbling over.
    Internal Medicine 07/2005; 44(6):603-6. · 0.94 Impact Factor
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